Malicious PDF — malware analysis report

Static analysis result for SHA-256 743a1de95034e216…

MALICIOUS

PDF

74.6 KB Created: 2021-05-18 12:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fc8f1461c6ae3dafcc56330fda64ae3 SHA-1: 113e49ac90bef6e3e35063d4163b87899892860a SHA-256: 743a1de95034e2164f29912d1713ddd6f9e10ca898f7533991d8d3de56b3262c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a heuristic indicating a large farm of external PDF links, with one prominent URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xezojetit.ru/strik?utm_term=emirates+airlines+pregnant+forms
    • https://cdn-cms.f-static.net/uploads/4453741/normal_601f3ee4ec0c4.pdf
    • https://cdn-cms.f-static.net/uploads/4385012/normal_605f3bd85ef8b.pdf
    • https://gomimujetaveve.weebly.com/uploads/1/3/1/4/131406784/womib.pdf
    • https://cdn-cms.f-static.net/uploads/4447087/normal_603f9d334e85c.pdf
    • https://cdn-cms.f-static.net/uploads/4369631/normal_604e79555852f.pdf
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5fd5f6657396e.pdf
    • https://kobejepofefes.weebly.com/uploads/1/3/5/3/135317692/edd329.pdf
    • https://cdn-cms.f-static.net/uploads/4445737/normal_6040ff41aa52a.pdf
    • https://bevikutemo.weebly.com/uploads/1/3/4/6/134648684/2062248.pdf
    • https://cdn-cms.f-static.net/uploads/4413120/normal_5fe9c737a9db7.pdf
    • https://cdn-cms.f-static.net/uploads/4503197/normal_600a3c542a970.pdf
    • https://cdn-cms.f-static.net/uploads/4486563/normal_5fe9da51bb507.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xuzakob/cheviot_school_uniform.pdf
    • https://s3.amazonaws.com/gavapozalilup/37707793301.pdf
    • https://s3.amazonaws.com/zomuzigo/wwe_monday_night_raw_bleacher_report.pdf
    • https://s3.amazonaws.com/jujadodedaruxix/56413728238.pdf
    • https://s3.amazonaws.com/nitirew/online_emulator_for_android_app_testing.pdf
    • https://s3.amazonaws.com/lezopobigeza/82353706957.pdf
    • https://uploads.strikinglycdn.com/files/a398b481-7a22-4f63-a47f-54641ac7f581/kobojewota.pdf
    • https://uploads.strikinglycdn.com/files/81185a2a-7409-4871-aaf7-297b88ea9d89/10588214977.pdf
    • https://s3.amazonaws.com/minabiwa/texib.pdf
    • https://uploads.strikinglycdn.com/files/27c59f4c-599a-45c3-aaf7-b5b455eb182e/the_end_of_one_piece_story.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e608.bin
ff66a87f1c20378d97a23a98978c94fe70015843a025c5600e5d9c93cffacc5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE608 5180 bytes
font_01_sfnt_off0000f790.bin
c82abe722e0eeb77ee85a9306d953d0198e37d9a7c25108af5dadcb846e4b20d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 10796 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.